提出了一种基于发电量最优分配理论的预防控制新方法.该方法首先对全网的潜在故障进行扫描,以EEAC稳定裕度与故障概率的乘积作为指标,通过故障排序滤除无危害的故障,并依次确定潜在危险故障对应的临界群,利用EEAC灵敏度分析技术求取其满足系统稳定裕度要求时的最小有功调整量△pmin及出现切机负效应时对应的出力调整极限△pmax,收缩参与出力调整的发电机节点的有功出力上下限.依据各参与调控的机组在各失稳模式临界群内中出现的次数n和稳定裕度对发电机出力变化的灵敏度来确定参与功率调整的机组的出力调整比例.把求取控制措施代价最小的预防控制最优解问题转化为有限发电功率调整范围内的最优分配问题.最后通过在新英格兰10机39节点系统上的仿真验证了所提方法的正确性与可行性.%A method of precaution control based on optimal dispatch of generation is proposed. Firstly, all potential faults of the net are scanned and then the no-harmful faults are excluded. Ranked by the product of EEAC stability margin and fault probability, the critical cluster group of potentially harmful fault can be identified. Secondly, the limit of power adjustment, △pmin and △pmax, can be determined with EEAC sensitivity analysis method. Thirdly, the ratios of active power adjustment of the generators are determined according to the number of critical generators and the sensitivity of the stability margin to generator output. Finally, the optimization of precaution control can be transformed into the optimal output dispatch of generators which are chosen in last step. Simulation results in New England 10-generator 39-bus system show the feasibility and correctness of this method.
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